HOWOT:
1) Prepare an empty partition or USB with at least 6 GB.
2) Format the partition or USB with GUID partition table and HFS+ partition with a name BootablePartition.
3) Go to /Application/Install macOS Mojave.app.
4) Show Package Contents.﻿﻿
5) Go to Contents/Sh﻿aredSupport you will find BaseSystem.dmg.
6) Double click on BaseSystem.dmg to mount.
7) From Disk Utilty click on your partition or the USB that you prepared from number (2).
8) Click on restore, and chose OS X ﻿Base Syste﻿m (BaseSystem.dmg image), then restore it to that partition or USB.
9) After restoring rename the partition back to BootablePartition.
9) Run this command:
rm -rfv /Volumes/BootablePartition/System/Installation/Packages
10) Create a new folder instead of the broken link and name it Packages, run this command:
mkdir -v /Volumes/BootablePartition/System/Installation/Packages
11) Go back to /Application/Install macOS Mojave.app and repeat number 2.
12) Go to Contents/Sh﻿aredSupport you will find InstallESD.dmg.
13) Mount InstallESD.dmg.
14) Run this command:
cp -v /Volumes/InstallESD﻿/Packages/OSInstall.mpkg /Volumes/BootablePartition/System/Installation/Packages/
15) Download the latest clover from https://sourceforge.net/projects/cloverefiboot/
16) Install clover on your USB BootablePartition or in a different USB to boot from it. delete all your CLOVER/kext/10.xx and keep others, make sure you don't have any extra kext rather than FakeSMC.kext in the other folder.
in my case I used FakeSMC.kext and my lan kext RealtekRTL8111.kext.
17) known Problems in my build:
If I updated directly from the apple store the installer in clover will boot with a cross circle sign.
The FIX is to add this to Clover KextT﻿oPatch Thanks to @sunKi http://www.insanelymac.com/forum/topic/327488-macos-high-sierra-final-release-is-out-17a365/page-10?do=findComment&comment=2505086 this fix is still working for me in mojave.
<key>KextsToPatch</key>
<array>
<dict>
<key>Comment</key>
<string>fix IO error ICH10 for 10.13, credit SunKi</string>
<key>Disabled</key>
<false/>
<key>Find</key>
<data>
RYX2D5XCiciD4P5mhcl4D4TSdQs=
</data>
<key>Name</key>
<string>AppleAHCIPort</string>
<key>Replace</key>
<data>
iciD4P5mhckPmMFBCMyQkJCQdQs=
</data>
</dict>
<dict>
<key>Comment</key>
<string>fix hotplug ICH10 for 10.13, credit SunKi</string>
<key>Disabled</key>
<false/>
<key>Find</key>
<data>
icglQGACAD1AIAAAdQyB4b9///+Ji1EBAAA=
</data>
<key>Name</key>
<string>AppleAHCIPort</string>
<key>Replace</key>
<data>
kJCQkJCQkJCQkJCQkJCQkJCQkJCQkJCQkJA=
</data>
</dict>
<dict>
<key>Comment</key>
<string>External icons patch</string>
<key>Disabled</key>
<false/>
<key>Find</key>
<data>
RXh0ZXJuYWw=
</data>
<key>Name</key>
<string>AppleAHCIPort</string>
<key>Replace</key>
<data>
SW50ZXJuYWw=
</data>
</dict>
</array>
18) make sure you have apfs.efi copy it from /Volumes/BootablePartition/usr/standalone/i386/apfs.efi to your EFI/CLOVER/drivers64/ and EFI/CLOVER/drivers64UEFI/.
19) SMBIOS mac model that I use is iMac13,2.
20) Go to /Application/Install macOS Mojave.app click on it and chose to install to your macOS Mojave partition.
21) Reboot.
22) From clover chose BootablePartion.
23) If everything is okie BootablePartition will boot to install macOS mojave, wait wait wait till it finish it might take to 1 hour just wait it will reach the auto reboot soon .
24) Boot to your old macOS Hight Sierra that will be your mojave partition now and enjoy.

Anything else is working for me I didn't need any extra clover kext so far, I tried whatevergreen.kext to fire up my rx 460 without the helper card but no success, So I am just sticking with booting from Nvidia as a first GPU from my motherboard configuration then swap the cables after choosing my macOS partion from clover.

After upgrading my HFS+ High Sierra partition converted to APFS, no know problem so far.

Happy build and more info about the partitioning method with a more detailed instructions in this post that I used to update my Sierra to High Sierra

Special thanks to crazybirdy, sunKi and all of you out there that make this happens.

Now have a Olarila app, just download app and clover folder for your Chipset!
https://olarila.com/forum/viewtopic.php?f=81&amp;t=6771
Install MacOS with Olarila Image, Step by Step, Install and Post Install